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3.29.3
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3.28.0
3.27.8
3.27.7
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3.27.5
3.27.4
3.27.3
3.27.2
3.27.1
3.27.0
3.26.0
3.25.2
3.25.1
3.25.0
retired
3.24.7
3.24.6
3.24.5
3.24.4
3.24.3
3.24.2
3.24.1
3.24.0
3.23.1
3.23.0
3.22.2
3.22.1
3.22.0
3.21.3
3.21.2
3.21.1
3.21.0
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3.19.2
3.19.1
3.19.0
3.18.0
3.17.1
3.17.0
3.16.0
3.15.0
3.14.1
3.14.0
retired
3.13.2
3.13.1
3.13.0
3.12.0
3.11.3
3.11.2
3.11.1
3.11.0
3.10.1
3.10.0
3.9.0
3.8.0
3.7.6
3.7.5
3.7.4
3.7.3
3.7.2
3.7.1
3.7.0
retired
3.6.3
retired
3.6.2
3.6.1
3.6.0
3.5.43
3.5.42
3.5.41
3.5.40
3.5.39
3.5.38
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3.5.36
3.5.35
3.5.34
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3.5.11
3.5.10
3.5.9
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3.5.7
3.5.6
3.5.5
3.5.4
3.5.3
3.5.2
3.5.1
3.5.0
3.4.74
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3.4.73
3.4.72
3.4.71
3.4.70
3.4.69
3.4.68
3.4.67
3.4.66
3.4.65
3.4.64
3.4.63
3.4.62
3.4.61
3.4.60
3.4.59
3.4.58
3.4.57
3.4.56
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3.4.53
3.4.52
3.4.51
3.4.50
3.4.49
3.4.48
3.4.47
3.4.46
3.4.45
3.4.44
3.4.43
3.4.42
3.4.41
3.4.40
3.4.39
3.4.38
3.4.37
3.4.36
3.4.35
3.4.34
3.4.33
3.4.32
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3.0.5
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3.0.1
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3.0.0-rc.46
3.0.0-rc.45
3.0.0-rc.44
3.0.0-rc.43
3.0.0-rc.42
3.0.0-rc.41
3.0.0-rc.40
3.0.0-rc.39
3.0.0-rc.38
3.0.0-rc.37
3.0.0-rc.36
3.0.0-rc.35
3.0.0-rc.34
3.0.0-rc.33
3.0.0-rc.32
3.0.0-rc.31
3.0.0-rc.29
3.0.0-rc.28
3.0.0-rc.27
3.0.0-rc.26
3.0.0-rc.25
3.0.0-rc.24
3.0.0-rc.23
3.0.0-rc.22
3.0.0-rc.21
3.0.0-rc.20
3.0.0-rc.19
3.0.0-rc.18
3.0.0-rc.17
3.0.0-rc.16
3.0.0-rc.15
3.0.0-rc.14
3.0.0-rc.13
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3.0.0-rc.11
3.0.0-rc.10
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3.0.0-rc.5
3.0.0-rc.4
3.0.0-rc.3
3.0.0-rc.1
3.0.0-rc.0
2.21.15
2.21.14
2.21.13
2.21.12
2.21.11
2.21.10
2.21.9
2.21.8
2.21.7
2.21.6
2.21.5
2.21.4
2.21.3
2.21.2
2.21.1
2.21.0
2.20.3
2.20.2
2.20.1
2.20.0
2.19.14
2.19.13
2.19.12
2.19.11
2.19.10
2.19.9
2.19.8
2.19.7
2.19.6
2.19.5
2.19.4
2.19.3
retired
2.19.2
retired
2.19.1
retired
2.19.0
retired
2.18.2
2.18.1
2.18.0
2.17.24
2.17.23
2.17.22
2.17.21
2.17.20
2.17.19
2.17.18
2.17.17
2.17.16
2.17.15
2.17.14
2.17.13
2.17.12
2.17.11
2.17.10
2.17.9
2.17.8
2.17.7
2.17.6
2.17.5
2.17.4
2.17.3
2.17.2
2.17.1
2.17.0
2.16.1
2.16.0
2.15.20
2.15.19
2.15.18
2.15.17
2.15.16
2.15.15
2.15.14
2.15.13
2.15.12
2.15.11
2.15.10
2.15.9
2.15.8
2.15.7
2.15.6
2.15.5
2.15.4
2.15.2
2.15.1
2.15.0
2.14.21
2.14.20
2.14.19
2.14.18
2.14.17
2.14.16
2.14.15
2.14.14
2.14.13
2.14.12
2.14.11
2.14.10
2.14.9
2.14.8
2.14.7
2.14.6
2.14.5
2.14.4
2.14.3
2.14.2
2.14.1
2.14.0
2.13.4
retired
2.13.3
2.13.2
2.13.1
2.13.0
2.12.1
2.12.0
2.11.11
2.11.10
2.11.9
2.11.8
2.11.7
2.11.6
2.11.5
2.11.4
2.11.3
2.11.2
2.11.1
2.11.0
2.11.0-rc.3
2.11.0-rc.2
2.11.0-rc.1
2.11.0-rc.0
2.10.2
2.10.1
2.10.0
2.9.29
2.9.28
2.9.27
2.9.26
2.9.25
2.9.24
2.9.23
2.9.22
2.9.21
2.9.20
2.9.19
2.9.18
2.9.17
2.9.16
2.9.15
2.9.14
2.9.13
2.9.12
2.9.11
2.9.10
2.9.9
2.9.8
2.9.7
2.9.6
2.9.5
2.9.4
2.9.3
2.9.2
2.9.1
2.9.0
2.8.1
2.8.0
2.7.1
2.7.0
2.6.31
2.6.30
2.6.29
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2.6.27
2.6.26
2.6.25
2.6.24
2.6.23
2.6.22
2.6.21
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1.52.0-rc.22
1.52.0-rc.21
1.52.0-rc.20
1.52.0-rc.19
1.52.0-rc.18
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1.51.2
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1.48.0-rc.23
1.48.0-rc.22
1.48.0-rc.21
1.48.0-rc.20
1.48.0-rc.19
1.48.0-rc.18
1.48.0-rc.17
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1.48.0-rc.14
1.48.0-rc.13
1.48.0-rc.12
1.48.0-rc.11
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1.48.0-rc.8
1.48.0-rc.7
1.48.0-rc.6
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1.48.0-rc.3
1.48.0-rc.2
1.48.0-rc.1
1.48.0-rc.0
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1.47.11
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1.46.12
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1.46.10
1.46.9
1.46.8
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1.45.0-rc20
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1.44.12
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1.44.9
1.44.8
1.44.7
1.44.6
1.44.5
1.44.4
1.44.3
1.44.2
1.44.1
1.44.0
1.43.12
1.43.11
1.43.10
1.43.9
1.43.8
1.43.7
1.43.6
1.43.5
1.43.4
1.43.3
1.43.2
1.43.1
1.43.0
1.42.0
1.41.12
1.41.11
1.41.10
1.41.9
1.41.8
1.41.7
1.41.6
1.41.5
1.41.4
1.41.3
1.41.2
1.41.1
1.41.0
1.40.0
1.39.7
1.39.6
1.39.5
1.39.4
1.39.3
1.39.2
1.39.1
1.39.0
1.38.0
1.37.2
1.37.1
1.37.0
1.36.22
1.36.21
1.36.19
1.36.18
1.36.17
1.36.16
1.36.15
1.36.14
1.36.13
1.36.12
1.36.11
1.36.10
1.36.9
1.36.8
1.36.7
1.36.6
1.36.5
1.36.4
1.36.3
1.36.2
1.36.0
1.35.1
1.35.0
1.34.9
1.34.8
1.34.7
1.34.6
1.34.5
1.34.4
1.34.3
1.34.2
1.34.1
1.34.0
1.33.0
1.32.2
1.32.1
1.32.0
1.31.1
1.31.0
1.30.2
1.30.1
1.29.0-rc1
1.29.0-rc0
1.28.1
1.28.0
1.27.1
1.27.0
1.26.13
1.26.12
1.26.11
1.26.10
1.26.9
1.26.8
1.26.7
1.26.6
1.26.5
1.26.4
1.26.2
1.26.1
1.26.0
1.25.8
1.25.7
1.25.6
1.25.5
1.25.4
1.25.3
1.25.2
1.25.1
1.25.0
1.24.2
1.24.1
1.24.0
1.23.3
1.23.2
1.23.1
1.23.0
1.22.1
1.22.0
1.20.1
1.20.0
1.19.1
1.19.0
1.18.1
1.18.0
1.17.1
1.17.0
1.16.2
1.15.1
1.15.0
1.14.0
1.13.4
1.13.3
1.13.2
1.13.1
1.13.0
1.12.0
1.11.1
1.11.0
1.10.0
1.9.0
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1.6.8
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1.6.1
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1.5.1
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1.3.1
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1.2.1
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1.0.3
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0.13.1
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0.2.0
0.1.9
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A declarative, extensible framework for building Elixir applications.
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lib/ash/query/function/function.ex
# SPDX-FileCopyrightText: 2019 ash contributors <https://github.com/ash-project/ash/graphs.contributors>
#
# SPDX-License-Identifier: MIT
defmodule Ash.Query.Function do
@moduledoc """
A function is a predicate with an arguments list.
For more information on being a predicate, see `Ash.Filter.Predicate`. Most of the complexities
are there. A function must meet both behaviours.
"""
import Ash.Expr, only: [expr?: 1]
@type arg :: any
@doc """
The number and types of arguments supported.
"""
@callback args() :: [arg] | :var_args
@doc """
The return type for each corresponding set of args.
"""
@callback returns() ::
[Ash.Type.t() | {Ash.Type.t(), constraints :: Keyword.t()}]
| Ash.Type.t()
| {Ash.Type.t(), constraints :: Keyword.t()}
| :unknown
@doc "The name of the function"
@callback name() :: atom
@doc "Instantiate a new function with the provided arguments"
@callback new(list(term)) :: {:ok, term} | {:error, String.t() | Exception.t()}
@doc "Evaluate a function when all arguments are known valid values"
@callback evaluate(func :: map) :: :unknown | {:known, term} | {:error, term}
@doc "Evaluate a function when some or no arguments are known valid values"
@callback partial_evaluate(func) :: {:ok, func} | {:error, term} when func: map
@doc "Whether or not the function can be evaluated eagerly. For example, `now()` cannot be."
@callback eager_evaluate?() :: boolean()
@doc "Whether or not the function is a predicate (takes a reference as the first argument, a value as the second, and returns a boolean)"
@callback predicate?() :: boolean()
@doc "Whether or not the function should be usable when parsing input."
@callback private?() :: boolean
@doc "Whether or not the function return nil."
@callback can_return_nil?(func :: map) :: boolean()
@doc """
If `true`, will be allowed to evaluate `nil` inputs.
If `false` (the default), any `nil` inputs will cause a `nil` return.
"""
@callback evaluate_nil_inputs?() :: boolean()
@optional_callbacks partial_evaluate: 1
@doc "Evaluate the operator with provided inputs"
def evaluate(%mod{arguments: arguments} = func) do
if Enum.any?(arguments, &is_nil/1) && !mod.evaluate_nil_inputs?() do
{:known, nil}
else
mod.evaluate(func)
end
end
def new(mod, args) do
args = List.wrap(args)
case mod.args() do
:var_args ->
# Varargs is special, and should only be used in rare circumstances (like this one)
# no type casting or help can be provided for these functions.
mod.new(args)
mod_args ->
configured_args = List.wrap(mod_args)
allowed_arg_counts = Enum.map(configured_args, &Enum.count/1)
given_arg_count = Enum.count(args)
if given_arg_count in allowed_arg_counts do
mod_args
|> Enum.filter(fn args ->
Enum.count(args) == given_arg_count
end)
|> Enum.find_value(&try_cast_arguments(&1, args))
|> case do
nil ->
{:error, "Could not cast function arguments for #{mod.name()}/#{given_arg_count}"}
casted ->
case mod.new(casted) do
{:ok, function} ->
if Enum.any?(casted, &expr?/1) do
if function_exported?(mod, :partial_evaluate, 1) && match?(%^mod{}, function) do
mod.partial_evaluate(function)
else
{:ok, function}
end
else
case function do
%^mod{__predicate__?: _} ->
if mod.eager_evaluate?() do
if mod.evaluate_nil_inputs?() ||
Enum.all?(function.arguments, &(not is_nil(&1))) do
case mod.evaluate(function) do
{:known, result} ->
{:ok, result}
:unknown ->
{:ok, function}
{:error, error} ->
{:error, error}
end
else
{:ok, nil}
end
else
{:ok, function}
end
_ ->
{:ok, function}
end
end
other ->
other
end
end
else
did_you_mean =
Enum.map_join(allowed_arg_counts, "\n", fn arg_count ->
" . * #{mod.name()}/#{arg_count}"
end)
{:error,
"""
No such function #{mod.name()}/#{given_arg_count}. Did you mean one of:
#{did_you_mean}
"""}
end
end
end
def try_cast_arguments(configured_args, args) do
args
|> Enum.zip(configured_args)
|> Enum.reduce_while({:ok, []}, fn
{nil, _}, {:ok, args} ->
{:cont, {:ok, [nil | args]}}
{arg, :any}, {:ok, args} ->
{:cont, {:ok, [arg | args]}}
{arg, :same}, {:ok, args} ->
{:cont, {:ok, [arg | args]}}
{%{__predicate__?: _} = arg, _}, {:ok, args} ->
{:cont, {:ok, [arg | args]}}
{arg, {type, constraints}}, {:ok, args} when type != :array ->
if expr?(arg) do
{:cont, {:ok, [arg | args]}}
else
case Ash.Query.Type.try_cast(arg, type, constraints) do
{:ok, value} -> {:cont, {:ok, [value | args]}}
:error -> {:halt, :error}
end
end
{arg, type}, {:ok, args} ->
if expr?(arg) do
{:cont, {:ok, [arg | args]}}
else
case Ash.Query.Type.try_cast(arg, type, []) do
{:ok, value} -> {:cont, {:ok, [value | args]}}
:error -> {:halt, :error}
end
end
end)
|> case do
{:ok, args} ->
Enum.reverse(args)
_ ->
nil
end
end
# Copied from https://github.com/andrewhao/ordinal/blob/master/lib/ordinal.ex
@doc """
Attaches the appropriate suffix to refer to an ordinal number, e.g 1 -> "1st"
"""
def ordinal(num) do
cond do
Enum.any?([11, 12, 13], &(&1 == Integer.mod(num, 100))) ->
"#{num}th"
Integer.mod(num, 10) == 1 ->
"#{num}st"
Integer.mod(num, 10) == 2 ->
"#{num}nd"
Integer.mod(num, 10) == 3 ->
"#{num}rd"
true ->
"#{num}th"
end
end
defmacro __using__(opts) do
quote do
@before_compile Ash.Query.Function
@behaviour Ash.Query.Function
if unquote(opts[:predicate?] || false) do
@behaviour Ash.Filter.Predicate
end
alias Ash.Query.Ref
defstruct [
:arguments,
name: unquote(opts[:name]),
embedded?: false,
__function__?: true,
__predicate__?: unquote(opts[:predicate?] || false),
extra: %{}
]
@impl Ash.Query.Function
def predicate?, do: unquote(opts[:predicate?] || false)
@impl Ash.Query.Function
def name, do: unquote(opts[:name])
@impl Ash.Query.Function
def new(args), do: {:ok, struct(__MODULE__, arguments: args)}
@impl Ash.Query.Function
def evaluate(_), do: :unknown
@impl Ash.Query.Function
def eager_evaluate?, do: unquote(Keyword.get(opts, :eager_evaluate?, true))
@impl Ash.Query.Function
def evaluate_nil_inputs?, do: false
@impl Ash.Query.Function
def private?, do: false
@impl Ash.Query.Function
def can_return_nil?(_), do: true
@impl Ash.Query.Function
def returns do
:unknown
end
defoverridable new: 1,
evaluate: 1,
private?: 0,
evaluate_nil_inputs?: 0,
can_return_nil?: 1,
returns: 0
if !unquote(opts[:no_inspect?]) do
defimpl Inspect do
import Inspect.Algebra
def inspect(%{arguments: args, name: name}, opts) do
concat(
to_string(name),
container_doc("(", args, ")", opts, &to_doc/2, separator: ",")
)
end
end
end
end
end
defmacro __before_compile__(_) do
quote generated: true do
if Module.defines?(__MODULE__, {:partial_evaluate, 1}, :def) do
def has_partial_evaluate?, do: true
else
def has_partial_evaluate?, do: false
end
end
end
end